<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>样式演示</title>
    <style>
div {
    border: 1px solid red;

}
        .left {
            width: 20%;
            float: left;
            height: 500px;

        }
        .center{
            width: 59%;
            float: left;
            height: 500px;
        }
        .right {
            width: 20%;
            float: left;
            height: 500px;
        }
.footer {
    clear: both;
    text-align: center;
    background: blue;
}
    </style>
</head>
<body>
<div>
    顶部
</div>
<div> 导航条</div>
<div class="left">
左侧图片
</div>
<div class="center">
    中间正文
</div>
<div class="right">
    右侧图片
</div>
<div class="footer">
    底部超链接
</div>

</body>
</html>